split ljpeg encoder out of mjpeg.c
[ffmpeg.git] / libavcodec / mjpegenc.c
index 53aae5c..8bf6492 100644 (file)
 #include "dsputil.h"
 #include "mpegvideo.h"
 #include "mjpeg.h"
+#include "mjpegenc.h"
 
 /* use two quantizer tables (one for luminance and one for chrominance) */
 /* not yet working */
 #undef TWOMATRIXES
 
-typedef struct MJpegContext {
-    uint8_t huff_size_dc_luminance[12]; //FIXME use array [3] instead of lumi / chrom, for easier addressing
-    uint16_t huff_code_dc_luminance[12];
-    uint8_t huff_size_dc_chrominance[12];
-    uint16_t huff_code_dc_chrominance[12];
-
-    uint8_t huff_size_ac_luminance[256];
-    uint16_t huff_code_ac_luminance[256];
-    uint8_t huff_size_ac_chrominance[256];
-    uint16_t huff_code_ac_chrominance[256];
-} MJpegContext;
-
 
 int mjpeg_init(MpegEncContext *s)
 {
@@ -365,7 +354,7 @@ void mjpeg_picture_trailer(MpegEncContext *s)
     put_marker(&s->pb, EOI);
 }
 
-static inline void mjpeg_encode_dc(MpegEncContext *s, int val,
+void mjpeg_encode_dc(MpegEncContext *s, int val,
                                    uint8_t *huff_size, uint16_t *huff_code)
 {
     int mant, nbits;
@@ -460,162 +449,3 @@ void mjpeg_encode_mb(MpegEncContext *s,
         encode_block(s, block[7], 7);
     }
 }
-
-static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
-    MpegEncContext * const s = avctx->priv_data;
-    MJpegContext * const m = s->mjpeg_ctx;
-    AVFrame *pict = data;
-    const int width= s->width;
-    const int height= s->height;
-    AVFrame * const p= (AVFrame*)&s->current_picture;
-    const int predictor= avctx->prediction_method+1;
-
-    init_put_bits(&s->pb, buf, buf_size);
-
-    *p = *pict;
-    p->pict_type= FF_I_TYPE;
-    p->key_frame= 1;
-
-    mjpeg_picture_header(s);
-
-    s->header_bits= put_bits_count(&s->pb);
-
-    if(avctx->pix_fmt == PIX_FMT_RGB32){
-        int x, y, i;
-        const int linesize= p->linesize[0];
-        uint16_t (*buffer)[4]= (void *) s->rd_scratchpad;
-        int left[3], top[3], topleft[3];
-
-        for(i=0; i<3; i++){
-            buffer[0][i]= 1 << (9 - 1);
-        }
-
-        for(y = 0; y < height; y++) {
-            const int modified_predictor= y ? predictor : 1;
-            uint8_t *ptr = p->data[0] + (linesize * y);
-
-            if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < width*3*4){
-                av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
-                return -1;
-            }
-
-            for(i=0; i<3; i++){
-                top[i]= left[i]= topleft[i]= buffer[0][i];
-            }
-            for(x = 0; x < width; x++) {
-                buffer[x][1] = ptr[4*x+0] - ptr[4*x+1] + 0x100;
-                buffer[x][2] = ptr[4*x+2] - ptr[4*x+1] + 0x100;
-                buffer[x][0] = (ptr[4*x+0] + 2*ptr[4*x+1] + ptr[4*x+2])>>2;
-
-                for(i=0;i<3;i++) {
-                    int pred, diff;
-
-                    PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
-
-                    topleft[i]= top[i];
-                    top[i]= buffer[x+1][i];
-
-                    left[i]= buffer[x][i];
-
-                    diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;
-
-                    if(i==0)
-                        mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
-                    else
-                        mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
-                }
-            }
-        }
-    }else{
-        int mb_x, mb_y, i;
-        const int mb_width  = (width  + s->mjpeg_hsample[0] - 1) / s->mjpeg_hsample[0];
-        const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
-
-        for(mb_y = 0; mb_y < mb_height; mb_y++) {
-            if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < mb_width * 4 * 3 * s->mjpeg_hsample[0] * s->mjpeg_vsample[0]){
-                av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
-                return -1;
-            }
-            for(mb_x = 0; mb_x < mb_width; mb_x++) {
-                if(mb_x==0 || mb_y==0){
-                    for(i=0;i<3;i++) {
-                        uint8_t *ptr;
-                        int x, y, h, v, linesize;
-                        h = s->mjpeg_hsample[i];
-                        v = s->mjpeg_vsample[i];
-                        linesize= p->linesize[i];
-
-                        for(y=0; y<v; y++){
-                            for(x=0; x<h; x++){
-                                int pred;
-
-                                ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
-                                if(y==0 && mb_y==0){
-                                    if(x==0 && mb_x==0){
-                                        pred= 128;
-                                    }else{
-                                        pred= ptr[-1];
-                                    }
-                                }else{
-                                    if(x==0 && mb_x==0){
-                                        pred= ptr[-linesize];
-                                    }else{
-                                        PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
-                                    }
-                                }
-
-                                if(i==0)
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
-                                else
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
-                            }
-                        }
-                    }
-                }else{
-                    for(i=0;i<3;i++) {
-                        uint8_t *ptr;
-                        int x, y, h, v, linesize;
-                        h = s->mjpeg_hsample[i];
-                        v = s->mjpeg_vsample[i];
-                        linesize= p->linesize[i];
-
-                        for(y=0; y<v; y++){
-                            for(x=0; x<h; x++){
-                                int pred;
-
-                                ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
-//printf("%d %d %d %d %8X\n", mb_x, mb_y, x, y, ptr);
-                                PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
-
-                                if(i==0)
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
-                                else
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    emms_c();
-
-    mjpeg_picture_trailer(s);
-    s->picture_number++;
-
-    flush_put_bits(&s->pb);
-    return pbBufPtr(&s->pb) - s->pb.buf;
-//    return (put_bits_count(&f->pb)+7)/8;
-}
-
-
-AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
-    "ljpeg",
-    CODEC_TYPE_VIDEO,
-    CODEC_ID_LJPEG,
-    sizeof(MpegEncContext),
-    MPV_encode_init,
-    encode_picture_lossless,
-    MPV_encode_end,
-};